Myron w



(No Model.)

M; W. PABRISH,

ELEOTRIG SIGNALING APPARATUS.

No. 381,576. PastentedApr. 24, 1888.

gm v llil'i nurse Arne Parana rr MYR-ON W. PARRISH, OF DETROIT, MICHIGAN, ASSIGNOR TO THE- PABRISH BROS. AND PEGK ELECTRICAL COMPANY, OF SAME PLACE.

ELECTRIC SIGNALING APPARATUS.

SSPECIFICATION forming part of Letters Patent No. 381,576, dated .t-hpril 24, 1888. Application filed August 3, 1887. Serial No. 245,085. (No model.)

To all whom it may concern.-

Be it known that I, MYRON \V. PARRISII, a citizen ofthe United States, residingat Detroit, county of \Vayne, State of Michigan, have in- 5 vented a new and useful Electric Signaling Apparatus, of which the following is a speci lication.

This invention relates to a disclosure in Letters Patent to Parrish and Parrish, No. 322,474, July 21, 1385, which consisted of two circuits, one of a higher resistance than the other, a generator or battery in the circuits, an alarm in the circuit of the higher resistance, and a circuit-breaker in the circuit of the lower resistance.

The object of the present invention is to combine additional elements with those above named to enable the engineer to signal a response to the party who has signaled him.

The invention is especially designed for use on steamboats to enable the captain to signal the engineer, and the latter to signal back to the captain.

In the drawing forming a part of this specification, the old elements above enumerated are shown in their relation with the new features.

Referring to the lettered parts of the draw ing, a generator is shown at 1* and an alarnr bell at D, located in the engine-room when in use. This generator and bell are in the higherresistance circuit 2, and the generator isin the lowenresistancc circuit 1. It will be, ofeourse, understood that there is suliicient length of wire in the magnet-coils of the bell D to make the circuit 2 of greater resistance than the circuit 1.

At A is a circuit-breaker in the lowerresistance circuit, which circuit-breaker in use will be at a convenient location to be operated by the captain. By breaking the circuit 1 the current will traverse the circuit 2 and ring the engineers hell 1). This action is the same as in the patent above referred to.

It is desirable that the captain should know whether or not the engineer heard the bell. It is desirable as well that, by prearranged signals of different significance, the captain and engineer shall be able to communicate orders, responses, directions, warnings, 830., to

each other. To this end I connect a captains bell, B, with the circuit of the lower resistance, and run an additional wire, 3, from the 1301113 to the generator. For convenience I attach the end of the wire 3 to the righthand portion of the circuit 1, as shown at the right of the circuit-breaker C; but in effect this wire 3 runs to the generator 1*, and said wire, to gether with the lower part of wire 1, establishcs another circuit in which are the gcner- 6o ator F and the captains bell B. This latter circuit, when made and the other two are both destroyed, rings the hell ]3. This will appear clear in the description of the operation.

To enable the engineer to break the circuits of the higher and the lower resistance, and to make the circuit which I will style the captains bcll'circuit, (ora rcturn-circuit,) I place in all the circuits a device which may be termed a combined circuit breaker and maker, (shown at G, and fully described in another pending application by William R. Cole, filed August 3, 1887, Serial No. 246,077.) It consists in a case having a series of spring metal fingers insulated from the case, and a spring-actuated plunger provided with metal collars c 6, one of which is of course insulated from the plunger. These collars contact with the spring -fingers, as in the drawing, and when in their normal condition the circuits of the higher and the lower resistance are made and the captain s bell circuit is broken. The engineer responds or signals to the captain by pulling the plunger of the device 0 downward, which action, disconnects the collars a e from the fingers of the wires 1 2 and contacts the collar 6 with the lingers of the wire 3, and this makes the return-circuit, and hence the captains bell B rings.

Itwill be observed that the captain cannot make the return circuit, and that he cannot ring the engineers bell D except when the de vice C is in its normal condition, and that both bells cannot be rung at the same time. Should the captain and the engineer make an effort to signal exactly at the same time, the act of the captain would have no effect, and only his bell, B, would ring.

The details of the cireuitbreaker A are not herein given; but the device is fully described in another application by William R. Cole, filed August 3, 1887, Serial No. 246,076. As any suitable device may be employed which in its normal condition makes the circuit, and which can be operated to break the circuit, I do not wish to limit my invention to any particular circuit-breaker. Neither do I wish to be limited to the particular device 0, many details of which are not herein shown.

Having thus described my invention, what I claim is An electric signaling apparatus comprising a circuit of a higher resistance, a circuit of a lower resistance, a generator or battery in said circuits, a bell or alarm in the circuit of the higher resistance, and a circuit-breaker in the lower-resistance circuit, whereby when the latter circuit is broken the circuit of the higher resistance will ring the-bell or alarm, and a unto subscribed my name in presence of two witnesses.

MYRON W. PARRISH.

Witnesses:

WILLIAM R. COLE, CHARLES REINKE. 

